JPH08197514A - Manufacture of plate-like artificial wood having straight grain pattern - Google Patents
Manufacture of plate-like artificial wood having straight grain patternInfo
- Publication number
- JPH08197514A JPH08197514A JP7009867A JP986795A JPH08197514A JP H08197514 A JPH08197514 A JP H08197514A JP 7009867 A JP7009867 A JP 7009867A JP 986795 A JP986795 A JP 986795A JP H08197514 A JPH08197514 A JP H08197514A
- Authority
- JP
- Japan
- Prior art keywords
- grain pattern
- plate
- artificial wood
- wood
- pattern
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Landscapes
- Dry Formation Of Fiberboard And The Like (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
Abstract
Description
【0001】[0001]
【産業上の利用分野】この発明は、柾目柄を有する合成
樹脂製の板状人工木材の製造方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for producing a synthetic resin plate-like artificial wood having a grain pattern.
【0002】[0002]
【従来の技術】従来、木目模様を付与した合成樹脂製の
人工木材の製造方法として、たとえば特公平3−598
04号公報に見られるように、木粉を混入した熱可塑性
樹脂からなる成形用樹脂材料を、丸形ダイスによりチュ
ーブ状に押出し成形したのち、これを長さ方向に切り開
き、平板状に展開することによって板状材料とする方法
が公知である。2. Description of the Related Art Conventionally, as a method for producing artificial wood made of synthetic resin with a grain pattern, for example, Japanese Patent Publication No. 3-598.
As can be seen in Japanese Patent Publication No. 04-04, a molding resin material made of a thermoplastic resin mixed with wood powder is extruded into a tube shape with a round die, cut out in the length direction, and expanded into a flat plate shape. A method of forming a plate-like material by this is known.
【0003】しかしながら、この従来の製法において
は、もとより表面に天然木材に近似した良好な木目模様
を付与しうるものではなく、まして高級感のある柾目模
様を付与しうるものではなかった。However, in this conventional manufacturing method, it is not possible to impart a good grain pattern close to that of natural wood to the surface, and it is not possible to impart a high-quality grain pattern.
【0004】一方、表面に柾目柄を付与した人工木材の
製造方法として、特開昭62−117724号公報に見
られるように、押出機の樹脂出口の内周面に樹脂の流れ
方向に沿った多数の溝を形成しておくことにより、押出
された成形物の表面に多数の凸条を形成し、冷却前にこ
の凸条をサイジングフォーマーで押し潰すことにより長
さ方向に連続した多数本の筋目模様からなる柾目柄を付
与する方法が提案されている。On the other hand, as a method for producing artificial wood having a grained pattern on the surface, as seen in Japanese Patent Laid-Open No. 62-117724, the inner peripheral surface of the resin outlet of the extruder is along the flow direction of the resin. By forming a large number of grooves, a large number of ridges are formed on the surface of the extruded molded product, and the ridges are crushed by a sizing former before cooling, so that a large number of ridges are continuous in the length direction. It has been proposed to provide a grain pattern consisting of the linear pattern.
【0005】しかし、かかる方法においては、表面に形
成した凸条部を押し潰して筋目模様とするものであるた
め、作業性に問題が残るのみならず、筋目が均一でかつ
目立ちすぎるものとなり、天然感に乏しい柾目模様しか
付与できないという問題があった。However, in this method, since the ridges formed on the surface are crushed to form a streak pattern, not only the workability problem remains, but also the streak lines are uniform and too conspicuous. There was a problem that only a grain pattern with a poor natural feeling could be applied.
【0006】このような背景の中で、本出願人は、先の
出願に係る実願平6−40186号により、成形用樹脂
材料として木目模様を付与するためのブラウン系等の着
色材粒子を混入したものを用いるものとすると共に、押
出し用の丸形ダイス内の環状樹脂通路の内周面または外
周面の一部に、凹凸状の表面摩擦手段を設けたものと
し、樹脂材料の表面に流動摩擦抵抗を与えることによ
り、成形物の表面に前記着色材料の押出し方向に配向さ
れた模様をあらわし、柾目柄を付与せしめるものとする
方法を提案した。[0006] Against this background, the applicant of the present application discloses, in accordance with Japanese Patent Application No. 6-40186, a colorant particle such as brown for imparting a wood pattern as a molding resin material. In addition to using the mixed ones, a part of the inner or outer peripheral surface of the annular resin passage in the round die for extrusion shall be provided with uneven surface friction means, and the surface of the resin material A method has been proposed in which a pattern oriented in the extrusion direction of the coloring material is displayed on the surface of the molded product by giving a flow frictional resistance to give a grain pattern.
【0007】上記の先行提案方法は、所期する柾目模様
の付与効果において十分に満足しうるものであったが、
更に次のような問題点を有することが遺憾とされるとこ
ろであった。The above-mentioned prior proposed method was sufficiently satisfactory in the desired effect of imparting a grain pattern,
It was regrettable that it had the following problems.
【0008】[0008]
【発明が解決しようとする課題】即ち、上記の方法によ
って形成される柾目模様は、人工木材の表層部分のみに
おいて、深さ0.1〜0.2mm程度の極く浅い範囲に形
成されているにすぎない。That is, the grain pattern formed by the above method is formed in an extremely shallow range of about 0.1 to 0.2 mm in depth only in the surface layer portion of the artificial wood. Nothing more.
【0009】このため、用途によって人工木材の表面を
研磨しあるいは切削したような場合、柾目模様が簡単に
消失してしまうおそれがある。のみならず、丸形ダイス
を使用して成形した人工木材においてはダイスのスパイ
ダー部において融着強度が低いことから、真空成形ある
いは圧空成形等の熱成形時に破れが発生するおそれがあ
り、このためひいては用法用途上の制約を受けるという
問題点があった。Therefore, when the surface of the artificial wood is polished or cut depending on the application, the grain pattern may easily disappear. Not only that, in artificial wood molded using a round die, since the fusion strength is low in the spider part of the die, there is a possibility that tearing may occur during thermoforming such as vacuum forming or pressure forming, As a result, there was a problem that it was restricted in usage.
【0010】この発明は、このような問題点に鑑み、こ
れを更に解決し、板状人工木材の厚み方向に対してその
ほぼ全体に均整な柾目模様を内有して、表面研磨によっ
ても消失することのない柾目柄を有すると共に、熱成形
時に破れが発生しない板状人工木材を得ることのできる
製造方法を提供することを目的とする。In view of such a problem, the present invention solves this problem further, and has a uniform grain pattern almost entirely in the thickness direction of the plate-like artificial wood, and disappears even by surface polishing. An object of the present invention is to provide a manufacturing method capable of obtaining a plate-shaped artificial wood that has a grain pattern that does not occur and that does not break during thermoforming.
【0011】[0011]
【課題を解決するための手段】この発明は、上記の目的
を達成するための方法として、木目模様を付与するため
の着色材を混入した成形用樹脂材料を、丸形ダイスを用
いた押出し機により所定直径のチューブ状に押出し成形
したのち、該押出しチューブを円周方向の一部で切り開
きかつ展開して板状の人工木材を得る方法において、前
記丸形ダイスの環状樹脂流路内の一部に、樹脂材料の流
れ方向に向いた多数の分流貫通孔を有する環状多孔部材
を介在配置し、上記分流貫通孔を通じて成形用樹脂材料
を一旦分流させたのち、ダイス出口に至るまでの過程で
再び集束融着一体化させることにより、肉厚の略全体に
柾目模様を有するチューブを押出すものとすることを特
徴とする柾目柄を有する板状人工木材の製造方法を要旨
とする。As a method for achieving the above object, the present invention is an extruder using a round die for molding resin material mixed with a coloring material for imparting a wood grain pattern. After extruding into a tube having a predetermined diameter by means of a method of obtaining an artificial wood in the form of a plate by opening and opening the extruded tube in a part of the circumferential direction, one of the circular resin channels in the circular die is used. In the part, an annular porous member having a large number of diversion through-holes oriented in the flow direction of the resin material is interposed, and the resin material for molding is once diverted through the diversion-through holes, and then in the process of reaching the die outlet. A gist of the method for producing a plate-shaped artificial wood having a grain pattern is characterized in that a tube having a grain pattern is extruded over substantially the entire wall thickness by re-focusing and fusing together.
【0012】好ましい実施態様において、前記分流貫通
孔は、丸形ダイス内の環状樹脂流路内において内外少な
くとも2列以上に、かつ隣接する列間において相互に千
鳥状配置に設けたものとし、また前記環状多孔部材は、
丸形ダイス内における環状樹脂流路の最大径部分を含む
その近傍位置に設けたものとすることが推奨される。[0012] In a preferred embodiment, the flow-dividing through holes are provided in at least two rows inside and outside the annular resin flow path in the round die and in a zigzag arrangement between adjacent rows. The annular porous member,
It is recommended that the circular die be provided at a position in the vicinity of the maximum diameter portion of the annular resin flow path in the die.
【0013】この発明に用いる成形用樹脂材料は、熱可
塑性合成樹脂に好ましくは木粉を混入した配合物をベー
ス材料とし、これに木目模様を形成するためのブラウン
系等の着色材を配合したものである。The molding resin material used in the present invention is a mixture of a thermoplastic synthetic resin and wood powder, preferably a base material, and a coloring agent such as brown for forming a wood grain pattern. It is a thing.
【0014】上記熱可塑性樹脂としては、特に限定され
るものではないが、具体的には例えばポリ塩化ビニル樹
脂(PVC)、アクリロニトリル・ブタジエン・スチレ
ン共重合体樹脂(ABS)、ポリスチレン樹脂(P
S)、ポリプロピレン樹脂(PP)等が用いられる。ま
た、木粉は、粒径80〜300メッシュ、含水率1〜5
%程度のものが好適に用いられる。その配合量は前記熱
可塑性樹脂100重量部に対し木粉10〜100重量部
程度とするのが好適であり、特に30〜70重量部とす
るのが好ましい。The thermoplastic resin is not particularly limited, but specifically, for example, polyvinyl chloride resin (PVC), acrylonitrile / butadiene / styrene copolymer resin (ABS), polystyrene resin (P).
S), polypropylene resin (PP), etc. are used. Further, the wood powder has a particle size of 80 to 300 mesh and a water content of 1 to 5
% Is preferably used. The blending amount is preferably about 10 to 100 parts by weight of wood powder, and particularly preferably 30 to 70 parts by weight with respect to 100 parts by weight of the thermoplastic resin.
【0015】着色材は、上記樹脂と木粉との混合物から
なるベース材料よりも濃色に着色された熱可塑性樹脂粉
末あるいはペレットからなるものであり、もとよりベー
ス材料の樹脂と良好な相溶性を有する同質のものを用い
るのが好ましい。ブラウン系着色材の一例として、例え
ばセントラル硝子株式会社製の「WR−PVC、W−3
2C、H244」(商品名)を好適物として挙示するこ
とができる。着色材の配合割合は、前記ベース材料10
0重量部に対し、2〜6重量部、特に好ましくは3〜5
重量部程度とすることにより好結果を得ることができ
る。The colorant is composed of a thermoplastic resin powder or pellets colored in a darker color than the base material made of a mixture of the above resin and wood powder, and has a good compatibility with the resin of the base material. It is preferable to use the same one that has. As an example of the brown colorant, for example, "WR-PVC, W-3 manufactured by Central Glass Co., Ltd.
2C, H244 ”(trade name) can be listed as a suitable item. The mixing ratio of the coloring material is 10
0 to 6 parts by weight, particularly preferably 3 to 5 parts by weight
Good results can be obtained by adjusting the amount to about parts by weight.
【0016】この発明による板状人工木材の製造は、上
記のような成形用樹脂材料を用い、図1に示すように丸
形ダイス(2)を装備した押出機(1)により、一旦チ
ューブ状に押出したのち、この押出しチューブ(10)を
ダイスの出口近くの位置において切断刃(3)により円
周方向の一部において切断し、これを展開状態に開いて
板状の人工木材(P)に成形するものである。展開した
のち、内部に残留する応力歪を除去するため、更に熱ロ
ールに通して安定化させる補整処理を施すものとするこ
とが望ましい。The plate-shaped artificial wood according to the present invention is produced by using the above-mentioned molding resin material and once using an extruder (1) equipped with a round die (2) as shown in FIG. Then, the extruded tube (10) is cut in a part in the circumferential direction by a cutting blade (3) at a position near the exit of the die, and the cut tube (10) is opened in a developed state to form a plate-shaped artificial wood (P). It is to be molded into. After the expansion, it is desirable to further pass through a hot roll to carry out a stabilizing treatment in order to remove the stress strain remaining inside.
【0017】上記押出し成形に際し、この発明は、その
押出機(1)に装備する丸形ダイス(2)内の環状樹脂
流路(4)内の一部に、樹脂材料の流れ方向に向いた多
数の分流貫通孔(6)を有する環状多孔部材(5)を介
在配置したものとする。そして、この環状多孔部材
(5)により、丸形ダイス(2)内のトピード(7)を
支持せしめたものとする。In the above extrusion molding, the present invention is directed to a part of the annular resin flow path (4) in the round die (2) equipped in the extruder (1) in the flow direction of the resin material. An annular porous member (5) having a large number of flow dividing through holes (6) is arranged in between. The annular porous member (5) is used to support the topede (7) in the round die (2).
【0018】これにより、押出機(1)のシリンダー
(8)内でスクリュー(9)により混練された樹脂材料
は、アダプター(11)を経て丸形ダイス(2)に送り込
まれ、トピード(7)によって内面側を画定された環状
樹脂流路(4)に拡開テーパー状の入口(4a)側から導
入され、該流路を通過する過程で、上記環状多孔部材
(5)の分流貫通孔(6)により一旦多数の独立した棒
状の流れに分流される。そして、環状樹脂流路(4)の
漸次径が縮小された出口(4b)側に至るに従って、上記
分流された樹脂材料は再び集束され、融着一体化されて
チューブ状に押出される。As a result, the resin material kneaded by the screw (9) in the cylinder (8) of the extruder (1) is sent to the round die (2) through the adapter (11), and the topeede (7). Is introduced into the annular resin flow channel (4) whose inner surface side is defined by the expanded tapered inlet (4a) side, and in the process of passing through the flow channel, the branch flow through hole (5) of the annular porous member (5). According to 6), it is once divided into a large number of independent rod-shaped streams. Then, as the annular resin flow path (4) reaches the outlet (4b) side where the diameter is gradually reduced, the divided resin material is refocused, fused and integrated, and extruded into a tube shape.
【0019】このため、樹脂材料は、上記多孔部材
(5)の分流貫通孔(6)に分流される際にそれに含ま
れる着色材が樹脂流れ方向に展伸配向され、集束一体化
後もこの分流痕(10a )が押出しチューブ(10)の周壁
の厚みの全体の中に残り、表裏面はもとより、内部に至
るまで柾目柄(A)が形成されたものとなる。従って、
展開後の板状人工木材(P)においても、その表裏面は
もとより厚み方向の略全体に亘って柾目柄(A)を有す
るものとなる。Therefore, in the resin material, when the resin material is divided into the flow dividing through holes (6) of the porous member (5), the coloring material contained in the resin material is stretched and oriented in the resin flow direction, and the coloring material remains even after the convergence and integration. The shunt (10a) remains in the entire thickness of the peripheral wall of the extruded tube (10), and the grain pattern (A) is formed not only on the front and back surfaces but also inside. Therefore,
The plate-like artificial wood (P) after being developed also has the grain pattern (A) not only on the front and back surfaces but also over substantially the entire thickness direction.
【0020】ところで、上記環状多孔部材(5)の分流
貫通孔(6)は、これがあまり大きすぎても、あるいは
逆に小さすぎても、天然木材に近似した良好な柾目柄
(A)の付与が困難である。このため、その孔径は、円
形孔の場合において3〜15mmの範囲、特に好ましくは
5〜10mmの範囲のものとするのが良い。円形孔にかぎ
らず、方形、五角形以上の多角形、ひょうたん形等の異
形のもの等に形成しても良い。By the way, the branch flow through hole (6) of the annular porous member (5) is provided with a good grain pattern (A) close to that of natural wood, even if it is too large or, conversely, too small. Is difficult. Therefore, in the case of a circular hole, its diameter is preferably in the range of 3 to 15 mm, particularly preferably 5 to 10 mm. The shape is not limited to the circular hole, and it may be formed in a different shape such as a square, a polygon having five or more sides, or a gourd.
【0021】また、上記貫通孔(6)は、大きさ及び形
状の異ったものを混在させても良い。この場合、人工木
材の表面に、筋目間隔等が不規則に変化した柾目柄をあ
らわすことができ、より一層天然木材の柾目柄に近似し
たものとすることができる。更にまた、上記貫通孔
(6)は、樹脂流路内において、図3に示すように周方
向に一列に設けるものとしても良いが、板状人工木材の
幅方向における強度の均一化をはかり、熱成形加工性を
向上すると共に、柾目柄を天然木材の柾目柄により近い
ものとするため、上記貫通孔(6)は樹脂流路(4)内
において、多孔部材(5)に内外2列ないし3列以上に
設け、しかも隣接する列間において相互に千鳥配置に設
けたものとすることが望ましい。図3は内外2列千鳥配
置に設けた例を、図5は3列千鳥配置に設けた例を示し
ている。それぞれの場合において、成形される板状人工
木材(P)は、図6及び図8に示すようにその断面の中
に貫通孔(6)による樹脂材料の棒状分流痕(10a )が
千鳥状積層配列状態に残り、厚さ方向の全体に柾目柄
(A)を有するものとなる。The through holes (6) may have different sizes and shapes mixedly. In this case, the surface of the artificial wood can have a grain pattern in which the spacing of the streaks is irregularly changed, and the grain pattern can be made more similar to the grain pattern of natural wood. Furthermore, the through holes (6) may be provided in a line in the circumferential direction in the resin flow path as shown in FIG. 3, but the strength of the plate-like artificial wood in the width direction is made uniform, In order to improve the thermoforming processability and make the grain pattern closer to the grain pattern of natural wood, the through holes (6) are formed in the resin flow path (4) in the porous member (5) in two rows inside and outside. It is desirable to provide them in three or more rows, and staggered arrangement between adjacent rows. FIG. 3 shows an example of staggered arrangement in the inner and outer two rows, and FIG. 5 shows an example of staggered arrangement in the three rows. In each case, the plate-shaped artificial wood (P) to be formed has a zigzag laminated stack of resin material rod-shaped diversion marks (10a) due to through holes (6) in its cross section, as shown in FIGS. 6 and 8. It remains in the arrayed state and has a grain pattern (A) in the entire thickness direction.
【0022】上記のような貫通孔(6)の配置構成によ
り、環状多孔部材(5)における樹脂流路(4)内部分
での開孔率は、少なくとも25%以上、特に好ましくは
40〜60%程度の範囲に設定することが望ましい。開
孔率が25%未満では、押出圧力の有害な増大を招き好
ましくない。また、60%をこえる開孔率では、環状多
孔部材の強度が弱くなり、押出圧力に耐えられなくなる
ことから、機械設計上好ましくない。By virtue of the arrangement configuration of the through holes (6) as described above, the open area ratio in the resin flow path (4) in the annular porous member (5) is at least 25% or more, particularly preferably 40 to 60. It is desirable to set it in the range of about%. When the porosity is less than 25%, the extrusion pressure is undesirably increased. On the other hand, if the porosity exceeds 60%, the strength of the annular porous member becomes weak and the extrusion pressure cannot be endured, which is not preferable in terms of mechanical design.
【0023】一方、環状多孔部材(5)の取付位置は、
ダイス(2)内の環状樹脂流路(4)内において、その
最も径が拡大された最大径部分または少なくともその近
傍位置に設定することが好ましい。あまり入口(4a)側
に近い位置に設定すると、良好な柾目柄の付与が困難な
ものとなる。逆に出口(4b)側にあまり近づくと製造さ
れる板状人工木材の曲げ強度や衝撃強度等の機械的強度
が弱いものとなるおそれがあると共に、柾目柄(A)の
表面肌に悪影響を与えることが懸念される。On the other hand, the mounting position of the annular porous member (5) is
In the annular resin flow path (4) in the die (2), it is preferable to set it at the maximum diameter portion with the largest diameter or at least in the vicinity thereof. If it is set too close to the entrance (4a) side, it will be difficult to give a good grain pattern. On the contrary, if it is too close to the outlet (4b) side, the mechanical strength such as bending strength and impact strength of the manufactured plate-like artificial wood may be weak, and the surface texture of the grain pattern (A) may be adversely affected. I am concerned about giving.
【0024】[0024]
【実施例】成形用樹脂材料として、ポリ塩化ビニル樹脂
100重量部と、平均粒径100μmの乾燥木粉30重
量部との混合物からなるベース材料100重量部に対
し、ブラウン系着色材(セントラル硝子株式会社製「W
R−PVC」)4重量部を混合したものを用いた。EXAMPLE As a molding resin material, 100 parts by weight of a polyvinyl chloride resin and 30 parts by weight of a dry wood powder having an average particle size of 100 μm were mixed with 100 parts by weight of a base material, and a brown colorant (central glass) was used. Co., Ltd. "W
R-PVC ") 4 parts by weight were mixed.
【0025】一方、押出機として、口径55mm、L/D
=18の2軸型押出機を用い、これに丸形ダイスを装備
した。丸形ダイスは、その内部の環状樹脂流路の最大径
部分に相当する中間部に、図3に示す態様に内外2列か
つ千鳥配置に多数の分流貫通孔(孔径7mmの円形)を開
口率50%に穿設形成した厚さ50mmの環状多孔部材を
組込んだものとした。On the other hand, as an extruder, the bore diameter is 55 mm, L / D
= 18 twin-screw extruder was used and equipped with a round die. The circular die has a large number of shunt through holes (circles with a hole diameter of 7 mm) arranged in two rows in the inner and outer rows and in a staggered arrangement in the intermediate portion corresponding to the maximum diameter portion of the annular resin passage inside the circular die. An annular porous member having a thickness of 50 mm formed by being drilled to 50% was incorporated.
【0026】そして、前記樹脂材料を上記押出機によ
り、直径200mm、肉厚3mmのチューブに押出成形し
た。ここに、押出条件は、押出機のホッパー部分の温度
170℃、シリンダーの出口部分の温度175℃、スク
リューの温度170℃、アダプターの温度175℃、丸
形ダイスの温度180℃、スクリューの回転速度20rp
mに設定した。The resin material was extruded into a tube having a diameter of 200 mm and a wall thickness of 3 mm by the above extruder. The extrusion conditions are as follows: extruder hopper temperature 170 ° C, cylinder outlet temperature 175 ° C, screw temperature 170 ° C, adapter temperature 175 ° C, round die temperature 180 ° C, screw rotation speed. 20rp
set to m.
【0027】次いで、丸形ダイスから押出された成形チ
ューブを、ダイス出口近傍に設けた切断刃により周方向
の一箇所で切り開き、シート状に展開したのち、放冷硬
化させて厚さ3mmの板状の人工木材製品を得た。Next, the molded tube extruded from the round die is cut open at one location in the circumferential direction by a cutting blade provided in the vicinity of the die outlet, developed into a sheet, and then allowed to cool and harden to give a plate having a thickness of 3 mm. A shaped artificial wood product was obtained.
【0028】この人工木材は、表裏面にいずれも天然木
材の木目模様に近似した美麗な柾目柄を有するものであ
り、しかも該柾目模様が厚さ方向の全体に分布している
ものであった。The artificial wood had a beautiful grain pattern on both the front and back sides, which was similar to the grain pattern of natural wood, and the grain pattern was distributed throughout the thickness direction. .
【0029】そこで、該人工木材の表面を1.0mmの深
さまで平均に研磨したところ、常時表面に良好な柾目柄
が模様態様を若干変化しながらあらわれるものであっ
た。Then, when the surface of the artificial wood was ground to a depth of 1.0 mm on average, a good grain pattern was always present on the surface while slightly changing the pattern form.
【0030】[0030]
【発明の効果】この発明は、上述の次第で表面に天然木
材の木目模様に近似した美麗な柾目柄を有する人工木材
を、押出し法によって効率良く製造することができるも
のであり、しかも上記柾目柄が表面部だけでなく、板厚
方向の内部にまで全体に分布して、表面研磨加工を行っ
ても柾目柄が消失することのないものとすることができ
る。従って、一般的な表面研磨や切削等の木材加工や熱
可塑性樹脂板に施される成形加工等を支障なく加えるこ
とが可能であり、用途範囲の拡大をはかることができ
る。Industrial Applicability According to the present invention, artificial wood having a beautiful grain pattern similar to the grain pattern of natural wood on the surface thereof can be efficiently produced by the extrusion method according to the above-mentioned conditions. The pattern can be distributed not only on the surface portion but also on the inside in the plate thickness direction so that the grain pattern does not disappear even if surface polishing is performed. Therefore, general wood processing such as surface polishing and cutting, molding processing performed on the thermoplastic resin plate, and the like can be added without any trouble, and the range of applications can be expanded.
【0031】また、請求項2においては、熱成形時に破
れを発生するおそれのない人工木材を得ることができ
る。Further, according to the second aspect, it is possible to obtain the artificial wood which is free from the risk of breaking during thermoforming.
【0032】更に請求項3においては、表面肌の良好な
柾目柄を有する人工木材を得ることができる。Further, according to the third aspect, it is possible to obtain an artificial wood having a fine grain pattern with a good surface skin.
【図1】この発明の実施に用いる押出機の概略縦断面図
である。FIG. 1 is a schematic vertical sectional view of an extruder used for carrying out the present invention.
【図2】押出しチューブを切り開いて板状に展開する態
様を示す斜視図である。FIG. 2 is a perspective view showing a mode in which an extruded tube is cut open and developed into a plate shape.
【図3】押出ダイスに装備する環状多孔部材の正面図で
ある。FIG. 3 is a front view of an annular porous member equipped in an extrusion die.
【図4】図3の環状多孔部材を用いた押出成形品の断面
組織を模式的に示す断面概念図である。FIG. 4 is a conceptual sectional view schematically showing a sectional structure of an extrusion molded article using the annular porous member of FIG.
【図5】環状多孔部材の変形例の正面図である。FIG. 5 is a front view of a modified example of the annular porous member.
【図6】図5の環状多孔部材を用いた場合の押出成形品
の断面組織を模式的に示す断面概念図である。6 is a conceptual cross-sectional view schematically showing the cross-sectional structure of an extrusion-molded product when the annular porous member of FIG. 5 is used.
【図7】環状多孔部材の更に他の変形例の一部正面図で
ある。FIG. 7 is a partial front view of still another modified example of the annular porous member.
【図8】図7の環状多孔部材を用いた場合の押出成形品
の断面組織を模式的に示す断面概念図である。8 is a conceptual cross-sectional view schematically showing the cross-sectional structure of an extrusion-molded product when the annular porous member of FIG. 7 is used.
1…押出機 2…丸形ダイス 3…切断刃 4…環状樹脂流路 5…環状多孔部材 6…分流貫通孔 10…押出しチューブ P…板状人工木材 A…柾目柄 DESCRIPTION OF SYMBOLS 1 ... Extruder 2 ... Round die 3 ... Cutting blade 4 ... Annular resin flow path 5 ... Annular porous member 6 ... Dividing flow through hole 10 ... Extrusion tube P ... Plate-shaped artificial wood A ... Grain pattern
Claims (3)
した成形用樹脂材料を、丸形ダイスを用いた押出機によ
り所定直径のチューブ状に押出し成形したのち、該押出
しチューブを円周方向の一部で切り開きかつ展開して板
状の人工木材を得る方法において、 前記丸形ダイスの環状樹脂流路内の一部に、樹脂材料の
流れ方向に向いた多数の分流貫通孔を有する環状多孔部
材を介在配置し、上記分流貫通孔を通じて成形用樹脂材
料を一旦分流させたのち、ダイス出口に至るまでの過程
で再び集束融着一体化させることにより、肉厚の略全体
に柾目模様を有するチューブを押出すものとすることを
特徴とする柾目柄を有する板状人工木材の製造方法。1. A molding resin material mixed with a coloring material for imparting a wood grain pattern is extruded into a tube having a predetermined diameter by an extruder using a round die, and the extruded tube is circumferentially formed. In the method for obtaining a plate-shaped artificial wood by cutting and expanding with a part of a ring, a part of the circular resin flow path of the round die has a plurality of shunt through-holes oriented in the flow direction of the resin material. By interposing a porous member, the molding resin material is once diverted through the diverting through hole, and then converged, fused and integrated again in the process up to the die outlet, thereby forming a grained pattern on almost the entire wall thickness. A method for producing a plate-shaped artificial wood having a grain pattern, which comprises extruding a tube having the grain.
いて内外少なくとも2列以上に、かつ隣接する列間にお
いて相互に千鳥配置に設けたものとすることを特徴とす
る請求項1記載の柾目柄を有する板状人工木材の製造方
法。2. The split flow through holes are provided in at least two rows inside and outside the annular resin flow path and in a zigzag arrangement with respect to each other between adjacent rows. A method for producing a plate-shaped artificial wood having a grain pattern.
環状樹脂流路の最大径部分を含むその近傍位置に設けた
ものとすることを特徴とする請求項1または2に記載の
柾目柄を有する板状人工木材の製造方法。3. The perforated pattern according to claim 1, wherein the annular porous member is provided at a position in the vicinity of the maximum diameter part of the annular resin flow path in the round die. A method for manufacturing a plate-shaped artificial wood having the same.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP7009867A JP2790985B2 (en) | 1995-01-25 | 1995-01-25 | Method for producing plate-shaped artificial wood having a straight-grained pattern |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP7009867A JP2790985B2 (en) | 1995-01-25 | 1995-01-25 | Method for producing plate-shaped artificial wood having a straight-grained pattern |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH08197514A true JPH08197514A (en) | 1996-08-06 |
JP2790985B2 JP2790985B2 (en) | 1998-08-27 |
Family
ID=11732097
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP7009867A Expired - Fee Related JP2790985B2 (en) | 1995-01-25 | 1995-01-25 | Method for producing plate-shaped artificial wood having a straight-grained pattern |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP2790985B2 (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH10189444A (en) * | 1996-11-25 | 1998-07-21 | Svg Lithography Syst Inc | Illumination system for use in scanning photolithographic apparatus |
JP2006103251A (en) * | 2004-10-08 | 2006-04-20 | Takiron Co Ltd | Manufacturing method for floor material, its manufacturing device, and floor material |
JP2011235577A (en) * | 2010-05-12 | 2011-11-24 | Mitsubishi Cable Ind Ltd | Extrusion head structure |
CN103568239A (en) * | 2012-08-11 | 2014-02-12 | 宁波康润机械科技有限公司 | Extruder |
CN104527019A (en) * | 2015-01-06 | 2015-04-22 | 长园电子(东莞)有限公司 | Double-layer plastic pipe extrusion die |
-
1995
- 1995-01-25 JP JP7009867A patent/JP2790985B2/en not_active Expired - Fee Related
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH10189444A (en) * | 1996-11-25 | 1998-07-21 | Svg Lithography Syst Inc | Illumination system for use in scanning photolithographic apparatus |
JP2006103251A (en) * | 2004-10-08 | 2006-04-20 | Takiron Co Ltd | Manufacturing method for floor material, its manufacturing device, and floor material |
JP4522813B2 (en) * | 2004-10-08 | 2010-08-11 | タキロン株式会社 | Floor material manufacturing method and apparatus, and floor material |
JP2011235577A (en) * | 2010-05-12 | 2011-11-24 | Mitsubishi Cable Ind Ltd | Extrusion head structure |
CN103568239A (en) * | 2012-08-11 | 2014-02-12 | 宁波康润机械科技有限公司 | Extruder |
CN104527019A (en) * | 2015-01-06 | 2015-04-22 | 长园电子(东莞)有限公司 | Double-layer plastic pipe extrusion die |
Also Published As
Publication number | Publication date |
---|---|
JP2790985B2 (en) | 1998-08-27 |
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